The case is flush with the screen meaning comes up about the same level as the screen. The curve of the glass is still accessible. If you don't have a screen sheild and drop it face down I would say your screen would be toast. Better go with a more robust case like an Otterbox.

The clear Speck for S6 and S7 allowed wireless charging, and so does the S8 version. If you are using the wireless charging built into some GM vehicles, it works but not all the time. However that is more a function of the wireless charging than the case, but the case affects the size and laying it on the vehicle wireless charger.